84 



GASEOUS METABOLISM OF INFANTS. 



all of the observations and one line of the table is assigned for each 

 experimental period. The arrangement by subjects is arbitrarily alpha- 

 betical, the observations with each infant being recorded in chrono- 

 logical order. Additional information is given as to the sex, age, and 

 body-weight without clothing for the infants included in the study. 

 While the carbon-dioxide production has been calculated on an hour 

 basis, the actual length of the periods is also given, and the carbon- 

 dioxide production for the individual periods may be readily calculated. 

 No period is included which was less than 10 minutes in length. The 

 results for the preliminary period of nearly all of the observations are 

 given, usually appearing in the first line of the data, but as these are 

 not used either in securing the average minimum metabolism, 1 or in com- 

 puting the respiratory quotient, the experimental periods are bracketed 

 to indicate this. No time is given for the observations, as the experi- 

 ments were almost without exception carried out in the afternoon. 

 The relation between the times of the observation and of the last 

 feeding is recorded in the footnotes of the table; when this is not 

 indicated, the feeding was invariably within 3 hours of the time when 

 the infant was placed in the apparatus. Usually the preliminary 

 period ended about 1 to 1| hours after feeding. A key to the designa- 

 tions of the relative activity is placed at the head of the table. A 

 full explanation of this method of estimating the activity may be found 

 on p. 136. 



Table 23. — Results of observations on the gaseous exchange of infants. 



[I, Very quiet, probably asleep; II, Slight movements, few in number; III, Some activity, but 

 generally quiet; IV, Moderately active; V, Distinctly active; VI, Very active, most or 

 all of the time.] 



Date. 



1913. 



Nov. 12 



Nov. 14 



Nov. 17 



Sex, age, and 



weight without 



clothing. 



M . A., male, 9 mos 

 5.70 kilos 



5 . 63 kilos 



5.80 kilos 



Respiratory 

 quotient. 



0.81 



0.79 



0.88 



Average 

 pulse-rate. 



117 

 103 

 103 

 101 

 104 



125 

 105 

 101 

 113 



118 

 114 

 116 

 110 

 110 



Relative 

 activity. 



V 

 III 

 III 

 III 



IV 



VI 



II 

 III 



VI 

 IV 



III 



IV 

 IV 



III 



Calculated from the weight of carbon dioxide produced during the period. The preliminary 

 periods for all days are omitted in computing the minimum metabolism. See table 31, p. 142. 



